cc: Make PictureLayerImpl use a better choice for animated raster scale.

cc/test/animation_test_common.cc

Index: cc/test/animation_test_common.cc
diff --git a/cc/test/animation_test_common.cc b/cc/test/animation_test_common.cc
index 9966b3448e1a3b1fd782b5ba6abff9de534ff6c4..7c1b3f6730b166e50fdd74ec5a29e5ad230378a0 100644
--- a/cc/test/animation_test_common.cc
+++ b/cc/test/animation_test_common.cc
@@ -169,7 +169,8 @@ bool FakeTransformTransition::AffectsScale() const { return false; }
 
 bool FakeTransformTransition::IsTranslation() const { return true; }
 
-bool FakeTransformTransition::MaximumScale(float* max_scale) const {
+bool FakeTransformTransition::MaximumTargetScale(bool forward_direction,
+                                                 float* max_scale) const {
   *max_scale = 1.f;
   return true;
 }